
John Chrysostom
Catena Aurea · Matthäusevangelium 13
Another parable put he forth unto them, saying, The kingdom of heaven is like to a grain of mustard seed, which, a man took, and sowed in his field: Which indeed is the least of all seeds: but when it is grown, it is the greatest among herbs, and becometh a tree, so that the birds of the air come and lodge in the branches thereof.
Or; The seed of the Gospel is the least of seeds, because the disciples were weaker than the whole of mankind; yet forasmuch as there was great might in them, their preaching spread throughout the whole world, and therefore it follows, But when it is grown it is the greatest among herbs, that is among dogmas.